Interstate Drive (Phase I)

Informational Virtual Open House

The St. Charles County Highway Department is hosting an Informational Virtual Open House on proposed improvements along Interstate Drive from Quail Ridge Park to the intersection of Prospect and Duello roads. 

Proposed improvements for Interstate Drive Phase I are expected to include:

  • Widening the existing roadway and adding paved shoulders to provide safer travel and an improved driving surface.
  • Improving drainage facilities and sight distance along the corridor.
  • Adding pedestrian accommodations from Duello and Prospect roads to Quail Ridge Park.
  • Upgrading the intersection at Prospect and Duello roads with a roundabout to improve traffic flow and accommodate continued expansion along the corridor.

The estimated $3.9 million project is funded by the St. Charles County 1/2-cent Transportation Sales Tax, as well as the Federal Highway Administration (FHWA). Oates Associates, Inc., is serving as the design engineering consultant.

Phase I is the final of a five-phase construction plan along Interstate Drive. Phase II included improvements from Quail Ridge Park to Route Z. Phase III included improvements from Route Z to Hepperman Road. Phase IV will extend Interstate Drive from its terminus just east of South Point Prairie Road to Hepperman Road and is currently in the right-of-way acquisition phase. Phase V connects Interstate Drive to the new David Hoekel Parkway west to Schaper Road and was completed in December 2020.

Current Phase

The estimated $3.9 million project is in the preliminary design stage. Preliminary plans are being updated following the virtual open house, then right-of-way plans will be started with property acquisition/negotiation expected to begin mid-2021. It is anticipated that construction of the project will begin in 2022.

Updated 3/8/21